Last Updated:2025/11/19
(grammar) A word that expresses the relative position of an item in a sequence. / (arithmetic) A natural number used to denote position in a sequence.
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Source Word
ordinal number
Noun
Japanese Meaning
(文法)項目の順序や相対的な位置を示す語、例として「第一」「第二」など、順番を示す表現として使われる。 / (算術)順序や位置を示すために用いられる自然数、たとえば配列中の位置を表すために用いられる数。
Sense(3)
(set
theory)
Such
a
number
generalised
to
correspond
to
any
cardinal
number
(the
size
of
some
set);
formally,
the
order
type
of
some
well-ordered
set
of
some
cardinality
a,
which
represents
an
equivalence
class
of
well-ordered
sets
(exactly
those
of
cardinality
a)
under
the
equivalence
relation
"existence
of
an
order-preserving
bijection".
( plural )